If you want more power, you're going to have to leave the batteries behind and move into mods. The choices (aside from form, price, size, weight, appearance, etc.) are power and self contained vs. removable batteries. The generally touted combo is an eLeaf iStick 50w and a Kanger Sub-tank or mini Sub tank. I personally prefer the Innokin iTaste MVP 3.0 Pro, but it's a bit more money. The Kanger tank works just fine on it, but I also think the Innokin iSub tank (.2ohms, replaceable coil heads) or the Innokin Gladius (.5 ohm replaceable heads) are also worth a look. If you want, you can move into rebuildables and make your own coils and wicks to suit your personal taste. This is more effort, but saves some expense as you can make a coil and wick a lot cheaper than the price the vape shop wants for coil heads. To start on with rebuildables, I'd suggest a Fogger V6 for dual coils or a Lemo2 for a single. You can buy both of them in the authentic version well under $50 each, without blowing $200 on a SvoeMesto Kayfun4-- if you can find one in stock-- or paying 30 bucks for a clone of it and not knowing if you'll get a good one. With a C-twist and a Aero-Tank, you current vape can't be above 12 or 13 watts, no matter how high you turn up the voltage. You might find a 20W mod is enough for you, just a bit more ommpf. But I'd suggest you go up to at least the 30-50W range. These can be turned down, but a 20W can't be turned up to 21 or above. Beyond that, how much do you want to spend, and how big a box do you want to lug around? You can buy a AsMODus Snow Wolf 200W Temperature Control mod for $100-- I just ordered one-- and the Segelei 150W (no TC) is now selling for in the $85-90 range. Same thing: you can turn them down, but a little one can't be turned up. I personally happen to favor removable batteries, but I'm coming from mechanical mods and I already have made the investment in batteries and a good charger; and am familiar with their foibles and comfortable using them. if "vape and not screw around with it" is where you want to be, there's a lot to be said for just plugging in a USB cord and charging an on-board battery. Talk to me a bit, tell me where you think you might like to go, and I'll do my best to help.